To be honest, I enjoy working on personal projects, shopping, eating takeaway food, trying every different coffee/tea in every coffee shop, socializing with friends or people I don't know and discussing random shit, organizing things that seem out of place, making group projects productive, taking control of things, listening to awesome music, walking, going to the cinema, having fun and a few drinks, making videos, being a weirdo, testing people, winding people up, writing novels/scripts, drawing things from my subconscious mind, playing the guitar, planning trips/projects, reading books, studying MBTI, going to drama group, going to my volunteer group, singing, having long showers, seeing/participating in fights, doing sexual things, talking to my online friends, fixing things, watching old movies, going on day trips, making beats, roleplaying, debating, people watching, cooking my college dinners, trying/learning/eating new things, watching sports and learning about the world through facts, stories, theories, opinions and the unknown.
Yes, my idea of "fun" is incredibly broad. I don't have one set of things which I consider fun, which I don't see as a bad thing at all.